`pavement`¶

Fractured bedrock: polygonal plates, each tilted and stepped, parted by cracks or raised ridges, split again by finer octaves of cracks; lays bedrock over the material map.

Key	Type	Default	Range	Unit	Description
`plate_size`	number	`1.0`	(0, inf)	m	Mean plate width, in metres.
`jitter`	number	`1.0`	[0, 1]		How far plate centres stray from a square lattice, from 0 (square plates) to 1.
`warp`	number	`0.15`	[0, inf)		Bend and roughness of the plate edges, in plate sizes.
`crack_width`	number	`0.05`	(0, inf)	m	Width of the cracks between plates, in metres.
`crack_depth`	number	`0.05`	[0, inf)	m	Depth of the cracks, or height of the ridges when raised, in metres.
`raised`	boolean	`false`			Whether plates are parted by raised ridges instead of cracks.
`edge_rounding`	number	`0.02`	[0, inf)	m	Width of the rounded shoulder beside each crack, in metres.
`max_tilt`	number	`0.05`	[0, 1.5708)	rad	Largest tilt of a plate, in radians.
`max_step`	number	`0.03`	[0, inf)	m	Largest height offset of a plate, up or down, in metres.
`octaves`	integer	`1`	[1, 8]		Crack octaves, 1 to 8: each finer octave splits every plate again, its cracks ending at the plate's edges.
`lacunarity`	number	`2.0`	(1, inf)		Plate size ratio between octaves, above 1.
`gain`	number	`0.5`	(0, 1]		Ratio of crack width, depth, rounding, tilt and step between octaves, in (0, 1].
`seed`	integer	`1`			Seed of the plates.
`exposure_spacing`	number	`1.0`	(0, inf)	m	Spacing in metres the ground is read at for the exposure field.
`anchor_x`	number	`0.0`			On a body, the longitude in degrees of the point whose tangent frame the plates are laid out in.
`anchor_y`	number	`0.0`			On a body, the latitude in degrees of the anchor.

exposure: Shows plates only where the ground beneath is bare bedrock, fading out over soil; unset shows them everywhere.

Key	Type	Default	Range	Unit	Description
`reach`	number	`12.0`	(0, inf)	m	Distance in metres around a point at which its surroundings are read, to tell rises from lows.
`rise_soil`	number	`0.01`			Height above the surroundings, as a share of the reach, at or below which the ground is soil.
`rise_boulder`	number	`0.035`			Height above the surroundings, as a share of the reach, at or above which the ground is bedrock; above the soil threshold.
`slope_soil`	number	`0.2`			Slope, as rise over run, at or under which soil holds.
`slope_boulder`	number	`0.4`			Slope, as rise over run, at or over which no soil holds and the ground is bedrock; above the soil threshold.
`floor_cover`	number	`0.0`	[0, 1)		Share of level ground that is bedrock too, in noise patches, as on a swept lava floor; from 0 to below 1, and 0 for none.
`floor_patch`	number	`60.0`	(0, inf)	m	Width of the bedrock patches on level ground, in metres.
`seed`	integer	`0`			Seed of the bedrock patches on level ground.

fade: How plates and cracks too fine for the sample spacing fade out, by samples across them.

Key	Type	Default	Range	Description
`start_samples`	number	`2.0`	[0, inf)	Samples across a feature's diameter up to which it is left out entirely.
`end_samples`	number	`4.0`	(0, inf)	Samples across a feature's diameter from which it is applied in full; it fades in between the two counts.
`shape`	one of `linear`, `smoothstep`, `smootherstep`, `gaussian`	`"smoothstep"`		Curve of the fade between the start and end sample counts.

Every key with its default

{
    "type": "pavement",
    "plate_size": 1.0,
    "jitter": 1.0,
    "warp": 0.15,
    "crack_width": 0.05,
    "crack_depth": 0.05,
    "raised": false,
    "edge_rounding": 0.02,
    "max_tilt": 0.05,
    "max_step": 0.03,
    "octaves": 1,
    "lacunarity": 2.0,
    "gain": 0.5,
    "seed": 1,
    "exposure": null,
    "exposure_spacing": 1.0,
    "anchor_x": 0.0,
    "anchor_y": 0.0,
    "fade": {
        "start_samples": 2.0,
        "end_samples": 4.0,
        "shape": "smoothstep"
    }
}

Used in: example_planets_mars_pavement

pavement¶

`pavement`¶